1. 非法常量
0x10.5 0X0G1 98.7U 17777s 0996 1.2Fe-7 15,000 .
2.
//只需要列出表达式就可以 int F = 27; //设置F为华氏温度，赋值 27 float C ; //设置C为摄氏温度，类型为浮点类型 C = (F-32)/1.8; NSLog(@"%.f",C); // %.f 保留一位小数就可以 //输出结果 2014-09-17 14:58:48.259 prog1[6058:303] -2.8 Program ended with exit code: 0
3. 输出结果为 d .
4.
float x = 2.55 , result ; result = 3 * (x * x * x) - 5 * (x * x) + 6 ; NSLog(@"result is %f",result); //结果如下 2014-09-17 15:11:11.064 prog1[6196:303] result is 23.231621
5.
//不知道这道题考的是什么 列出表达式过了得了 double result; result = (3.31e-8 + 2.01e-7) / (7.16e-6 + 2.01e-8); NSLog(@"result is %e",result); //输出结果 2014-09-17 15:29:31.547 prog1[6274:303] result is 3.260400e-02 Program ended with exit code: 0
6.
//-------------interface部分----------- @interface Complex : NSObject - (void) setReal: (double) a; //设置实数 - (void) setImaginary: (double) b; //设置虚数 - (void) print; //打印结果 - (double) real; - (double) imaginary; @end //--------------implementation部分---------------- @implementation Complex { double real; double imaginary; } - (void) setReal: (double) a { real = a; } - (void) setImaginary: (double) b { imaginary = b; } - (void) print { NSLog(@"The complex is %.f + %.fi", real, imaginary); } - (double) real { return real; } - (double) imaginary { return imaginary; } @end //----------------program部分------------- int main(int argc, const char * argv[]) { @autoreleasepool { Complex * newComplex = [[Complex alloc]init]; [newComplex setReal:11]; [newComplex setImaginary:22];
//下面两个方法都可以 ，分别测试 print方法和 real,imaginary方法；（应题目要求） [newComplex print];
// NSLog(@"The complex is %.f + %.fi",[newComplex real],[newComplex imaginary]);
} return 0; } //结果如下 2014-09-17 17:27:59.830 prog1[6678:303] The complex is 11 + 22i Program ended with exit code: 0
7.
//-----------------interface部分------------------ @interface Rectangle : NSObject - (void) setWidth: (int) w; //设置矩形宽度 - (void) setHeight: (int) h; //设置矩形高度 - (int) width; - (int) height; - (int) area; //面积 - (int) perimeter; //周长 @end //----------------implementation部分--------------- @implementation Rectangle { int width; int height; } - (void) setWidth: (int) w { width = w; } - (void) setHeight: (int) h { height = h; } - (int) width { return width; } - (int) height { return height; } - (int) area { return (width * height); } - (int) perimeter { return 2*(width + height); } @end //-----------------program部分-------------- int main(int argc, const char * argv[]) { @autoreleasepool { Rectangle *newRectangle = [[Rectangle alloc]init]; [newRectangle setWidth:12]; [newRectangle setHeight:21]; //测试新类的各个方法-------------- NSLog(@"Width of newRectangle is %d", [newRectangle width]); NSLog(@"Height of newRectangle is %d", [newRectangle height]); NSLog(@"Area of newRectangle is %d", [newRectangle area]); NSLog(@"Perimeter of newRectangle is %d", [newRectangle perimeter]); } return 0; } //结果如下 2014-09-17 22:55:03.825 prog1[7272:303] Width of newRectangle is 12 2014-09-17 22:55:03.827 prog1[7272:303] Height of newRectangle is 21 2014-09-17 22:55:03.827 prog1[7272:303] Area of newRectangle is 252 2014-09-17 22:55:03.827 prog1[7272:303] Perimeter of newRectangle is 66 Program ended with exit code: 0
8.
//----------------interface部分--------------- @interface Calculator : NSObject //设置累加器 - (void) setAccumulator: (double) value; - (void) clear; - (double) accumulator; //加减乘除 - (double) add: (double) value; - (double) subtract: (double) value; - (double) multiply: (double) value; - (double) divide: (double) value; @end //------------------implementation部分------------------ @implementation Calculator { double accumulator; } - (void) setAccumulator: (double) value { accumulator = value; } - (void) clear { accumulator = 0; } - (double) accumulator { return accumulator; } - (double) add: (double) value { accumulator += value; return accumulator; } - (double) subtract: (double) value { accumulator -= value; return accumulator; } - (double) multiply: (double) value { accumulator *= value; return accumulator; } - (double) divide: (double) value { accumulator /= value; return accumulator; } @end //---------------------program部分------------------ int main(int argc, const char * argv[]) { @autoreleasepool { Calculator *deskCalc = [[Calculator alloc]init]; [deskCalc setAccumulator:100.0]; NSLog(@"%g",[deskCalc add:10]); NSLog(@"%g",[deskCalc subtract:10]); NSLog(@"%g",[deskCalc multiply:10]); NSLog(@"%g",[deskCalc divide:10]); } return 0; }
9.
//----------------interface部分--------------- @interface Calculator : NSObject //设置累加器 - (void) setAccumulator: (double) value; - (void) clear; - (double) accumulator; //加减乘除 - (double) add: (double) value; - (double) subtract: (double) value; - (double) multiply: (double) value; - (double) divide: (double) value;
//改变累加器正负号，累加器的倒数，累加器的平方
- (double) changeSign;
- (double) reciprocal;
- (double) xSquared;
@end
//------------------implementation部分------------------ @implementation Calculator { double accumulator; } - (void) setAccumulator: (double) value { accumulator = value; } - (void) clear { accumulator = 0; } - (double) accumulator { return accumulator; } - (double) add: (double) value { accumulator += value; return accumulator; } - (double) subtract: (double) value { accumulator -= value; return accumulator; } - (double) multiply: (double) value { accumulator *= value; return accumulator; } - (double) divide: (double) value { accumulator /= value; return accumulator; }
- (double) changeSign
{
accumulator = -accumulator;
return accumulator;
}
- (double) reciprocal
{
accumulator = 1/accumulator;
return accumulator;
}
- (double) xSquared
{
accumulator = accumulator * accumulator;
return accumulator;
}
@end //---------------------program部分------------------ int main(int argc, const char * argv[]) { @autoreleasepool { Calculator *deskCalc = [[Calculator alloc]init]; [deskCalc setAccumulator:100.0]; // NSLog(@"%g", [deskCalc add:10]); // NSLog(@"%g", [deskCalc subtract:10]); // NSLog(@"%g", [deskCalc multiply:10]); // NSLog(@"%g", [deskCalc divide:10]); NSLog(@"%g", [deskCalc changeSign]); NSLog(@"%g", [deskCalc reciprocal]); NSLog(@"%g", [deskCalc xSquared]); } return 0; }
10.
//inerface //内存相关 - (double) memoryClear; //清理内存 - (double) memoryStore; //设置内存为累加器 - (double) memoryRecall; //设置累加器到内存 - (double) memoryAdd: (double) value; //添加值到内存 - (double) memorySubtract: (double) value; //与内存的值相减 //@implementation - (double) memoryClear { memory = 0.0; return accumulator; } - (double) memoryStore { memory = accumulator; return accumulator; } - (double) memoryRecall { accumulator = memory; return accumulator; } //应题目要求，所有方法返回值都是累加器。但是全是无用功 //正确的方法是 accumulator = memory - (double) memoryAdd: (double) value { memory += value; return accumulator; } - (double) memorySubtract: (double) value { memory -= value; return accumulator; }